This list of the Mesozoic life of Alaska contains the various prehistoric life-forms whose fossilized remains have been reported from within the US state of Alaska and are between 252.17 and 66 million years of age.
A
Acila
†Actinoceramus
†Actinoceramus concentricus
†Actinoceramus sulcatus
†Alaskacephale – type locality for genus
†Alaskacephale gangloffi – type locality for species
†Allocotidus – type locality for genus
†Allocotidus bruesi – type locality for species
†Alpinophyllia
†Alpinophyllia flexuosa
†Amaltheus
†Amblydactylus
†Amblysiphonella
†Amoeboceras
†Ampakabastraea
†Ampakabastraea cowichanensis
†Ampakabastraea nodosa – or unidentified comparable form
Amusium
†Anagaudryceras
†Anagaudryceras auranium
†Anagaudryceras aurarium
†Anagaudryceras inflatus
†Anagaudryceras sacya – type locality for species
†Anapachydiscus
†Anapachydiscus nelchinensis – type locality for species
†Anatomites
†Anatomites externiplicatus
†Anatomites septentrionalis – type locality for species
†Andangularia
†Andangularia wilsoni – type locality for species
†Anomia
†Anoptychia – tentative report
†Anthostylis
†Anthostylis acanthophora
†Antiquilima – tentative report
†Aopullina – tentative report
†Aquilapollenites
†Aquilapollenites decorus
†Aquilapollenites fusiformis
†Aquilapollenites quadrilobus
†Aquilapollenites reticulatus
†Aquilapollenites scabridus
†Arcestes
†Archaeocidaris – tentative report
†Archaeodictyomitra
†Archaeodictyomitra exigua – type locality for species
†Archaeospongoprunum
†Archaeospongoprunum helense – type locality for species
†Arcthoplites
†Arcthoplites belli
†Arcthoplites talkeetnanus
Arctica – tentative report
†Arcticoceras
†Arctocephalites
†Arctocephalites alticostus
†Arctocephalites costidensus – type locality for species
†Arctocephalites pompeckji
†Arctoceras
†Arctoceras blomstrandi
†Arctoceras tuberculatum
†Arctoceras tuberculatus
†Arctopteris
†Arctopteris kolymensis – or unidentified related form
†Arctopteris rarinervis
†Areaseris
†Areaseris nevadensis
†Arieticeras
†Arieticeras domarense – or unidentified related form
†Arnioceras
†Arnioceras arnouldi – or unidentified comparable form
†Arpadites – tentative report
†Aspenites
†Aspenites acutus
Astarte
†Astarte carlottensis
†Asthenoceras
†Asthenoceras nannodes – or unidentified related form
†Astraeomorpha
†Astraeomorpha confusa
†Astraeomorpha crassisepta
†Astrocoenia – tentative report
†Atractites
†Atreta
†Aucella
†Aucella okensis
†Aucella spitiensis
†Aucella subokensis
†Aucellina
Avicula
†Avicula soperi
†Aviculopecten
†Azonia
†Azonia cribrata
†Azonia pulchella
†Azonia strictiparva
B
†Baculites
†Baculites occidentalis
†Badouxia
†Badouxia canadensis
†Badouxia columbiae
†Bathysiphon
†Belemnites
†Betraccium
†Betraccium perilense – or unidentified related form
†Bipedis
†Bipedis acrostylus
†Biplica
†Birisia
†Birisia alata
†Birisia ochotica
†Birisia oerstedtii – or unidentified comparable form
†Bisulcocypridea
†Bositra
†Bositra buchi – or unidentified comparable form
†Bradfordia
†Bradfordia oppeliiformis – type locality for species
†Brewericeras
†Brewericeras breweri
†Brewericeras hulenense
†Brewericeras hulense – or unidentified comparable form
†Buchia
†Buchia bronni – or unidentified comparable form
†Buchia concentrica
†Buchia crassicolis
†Buchia crassicollis
†Buchia fischeriana – or unidentified related form
†Buchia keyserlingi
†Buchia mosquensis
†Buchia pacifica
†Buchia pallasi – or unidentified comparable form
†Buchia piochii
†Buchia rugosa
†Buchia solida
†Buchia sublaevis
†Bullatimorphites
†Bullatimorphites varicostatum – type locality for species
C
†Cadoceras
†Cadoceras bathomphalum – type locality for species
†Cadoceras catostoma
